Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
       Order Entomotaeniata Bartsch, 1916
         Superfamily Pyramidellacea see Superfamily Pyramidelloidea Gray, 1840
           Family Pyramidellidae Gray, 1840
             Subfamily Pyramidellinae Gray, 1840
               1 Genus Milda Dall & Bartsch, 1904 see Subgenus Milda Dall & Bartsch, 1904
               2 Genus Otopleura Fischer, 1885
               3 Genus Pyramidella Lamarck, 1799